/* Special Initializers for certain USB Mass Storage devices * * $Id: initializers.c,v 1.1.1.1 2003/06/23 22:18:36 jharrell Exp $ * * Current development and maintenance by: * (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net) * * This driver is based on the 'USB Mass Storage Class' document. This * describes in detail the protocol used to communicate with such * devices. Clearly, the designers had SCSI and ATAPI commands in * mind when they created this document. The commands are all very * similar to commands in the SCSI-II and ATAPI specifications. * * It is important to note that in a number of cases this class * exhibits class-specific exemptions from the USB specification. * Notably the usage of NAK, STALL and ACK differs from the norm, in * that they are used to communicate wait, failed and OK on commands. * * Also, for certain devices, the interrupt endpoint is used to convey * status of a command. * * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more * information about this driver. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "initializers.h" #include "debug.h" /* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target * mode */ int usb_stor_euscsi_init(struct us_data *us) { unsigned char data = 0x1; int result; US_DEBUGP("Attempting to init eUSCSI bridge...\n"); result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0), 0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR, 0x01, 0x0, &data, 0x1, 5*HZ); US_DEBUGP("-- result is %d\n", result); US_DEBUGP("-- data afterwards is %d\n", data); return 0; }